Detachable-calk horseshoe.



PATENTED AUG. 28, 1906.

M. HALLANAN. DETAGHABLE CALK HORSESHOE.

APPLICATION FILED MAY4, 1904. v

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PATENT OFFICE.

MICHAEL HALLANAN, OF NEW YORK, N. Y.

DETACHABLE-CALK HORSESHOE.

Specification of Letters Patent.

Patented Aug. 28, 1906.

Application filed May 4, 1904. Serial No. 206,289.

To all whom it may concern.-

Be it known that I, MICHAEL HALLANAN, a citizen of the United States,residin in the city, county, and State of New York, have inventedcertain new and useful Improvements in Detachable-Calk Horseshoes, ofwhich the following is a specification.

My invention relates to improvements in metallic horseshoes providedwith detachable calks; and the objects of my improvements are to providea shoe which will be light in weight, which can be used either with orwithout the detachable calks, in combination with an elastic pad, ifdesired, to so construct the metallic shoe that the sockets for thedetachable calks will be protected from injury when the shoe is usedwithout the de-- tachable calks, and to so construct the detachablecalks that their holding powers will be retained until completely wornout. I attain these objects in the manner illustrated in theaccompanying drawings, wherein similar reference-numerals relate tosimilar parts throughout the several views.

Figure 1 is a face view of my improved shoe combined with an elasticpad; Fig. 2, a side view of the structure of Fig. 1; Fig. 3, a view ofthe metallic shoe with one of the detachable calks removed; Fig. 4, across-section on the line :r 00 of Fig. 3 looking in the direction ofthe arrows Fig. 5, a view of one of the detachable calks.

1 is a metallic horseshoe which may be either full size-that is,extending back to the heelsor of the tip or lunette type and used inconjunction with any suitable pad 2, as shown in Figs. 1 and 2, whichpad has the heel-block 4 extending across the entire width, the centralbulb 5, the flange 6, and the backing 3.

The shoe has the usual nail-holes 7 at proper intervals and is providedwith a toecalk 8, which is cut away so as to present the flat facein therear, as shown in section in Fig. 4. At the rear or heel part are thecalks 10 10, which are substantially square at the side and rear andconcaved on the inner sides or corners, as at 11 1 1. These calks 8 1010 may be termed the permanent calks. Immediately behind the toe-calk 8and in the flat face of the shoe are two sockets, one of which, 12, isshown in Fig. 3. Similar sockets are made within or adjacent to theconcaved portions of the heel-calks 10 10. While I have shown but fourof these calk-sockets, I do not limit myself to any specific number.These sockets are tapped to receive the threaded stems 14 of the calks15. The calks are preferably star-shaped in cross-section, asillustrated in the various figures. Any suitable means of attachment maybe used instead of the screw. These detachable calks are made slightlyhigher than the permanent calks 8 10 10. In ordinary weather thepermanent calks give sufiicient purchase to enable the horse to travelin safety; but when the pavements are extremely slippery the detachablecalks may be inserted and give such purchase that the horse is at alltimes assured of a secure footing. The calks, being easily detachable,can be removed when the animal is in the stable, thereby saving wear onthe floors, or worn calks may be quickly and easily replaced by newones..

The permanent calks, being adjacent to and higher than the sockets forthe removable calks, protect them from injury whether the calks are inplace or removed. Heretofore detachable-calk shoes have been defective,because the sockets for the detachable calks were made in a flat shoeand unless the calks were always inserted the holes became battered anddefaced by the pounding on the pavement and when it became necessary toinsert the detachable calks they would not enter the sockets. As aresult, the shoe had to be removed from the hoof and the sockets reamedout and refinished.

The star-shaped detachable calk used by me retains its holding powersuntil worn out, differing in this respect from the usual cone, which asit wears flat and smooth gradually loses its gripping powers.

If an elastic ad is to be used in conjunction with the sfloe, theheelblock 4 is made slightly thicker than the height of the permanentcalks, so that the full cushioning efiect is obtained. The center of thepad may be depressed on its upper side, thereby lightening the weightand relieving frog-pressure.

The calks at the heels being cut off approximately square, as shown inFig. 2, abut against the heel-block of the pad for a considerablevertical distance, thereby exerting suflicient pressure to hold theheel-block in place and prevent it from sagging away from the heel orflapping.

I am aware that square butt-joints have heretofore been used between themetal shoe and the heel-block of the pad; but the vertical line ofcontact has always been so short that no support has been afforded thepad. If the shoe is thickened to secure a sufficient support, the weightis al most prohibitive. By usin heel-calks abutting against theheel-block a light-Weight shoe can be used and a sufficiently-longvertical line of contact secured to hold the heelblock of the pad inplace.

Having thus described my invention, What I claim as new, and desire tosecure by Letters Patent, is

1. A detachable-calk horseshoe having a permanent calk extending alongthe front edge at the toe, a flat surface behind said calk havingsockets therein adapted to receive detachable calks; heel-calks at therear of the shoe concaved on the inner corners; and sockets on the flatpart of the shoe adjacent to the concavities adapted to receive thedetachable calks.

2. A detachable-calk horseshoe having a permanent calk extending alongthe front edge at the toe, a flat surface behind said calk havingsockets therein heel-calks at the rear of the shoe concaved at the innercorners and sockets on the flat part of the shoe adjacent to theconcavities; and removable calks engaging said sockets.

3. The combination of a metallic horseshoe having a permanent calk alongthe toe, a flat face behind said calk, sockets in said face, heel-calksconcaved on the inner corners, sockets in the flat part of the shoeadjacent thereto, and detachable calks having a substantiallystar-shaped cross-sectional Wearing-surface and provided With means forengaging the sockets on the shoe.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing Witnesses.

MICHAEL HALLANAN Witnesses Row. B. KILLeoRE, FRANK H. WIMMEL.

